the skull, it's rough inside the skull, and that it tears at the brain when the brain hits so hard against the skull and it can tear the fibers of the brain and that can have lasting impact. headaches, difficulty concentrating, vision, balance problem and each depression and suicide. and so now what has happened this movement across the country over the last ten years has really spread telling doctors, telling athletes, telling their coaches and the parents if you suspect that an athlete has a head injury, they have to come off the field immediately and we're not just talking football. we are talking soccer, lacrosse, basketball, baseball, anything at all where a child or a player may need to come off the field. >> a lot of these sports you just mentioned, you know, really aren't wearing helmets. football, obviously. what is the congressional committee proposing in terms of combating this? >> what they are suggesting is to take what is already law in ten states and make it national.